Trematodes Flashcards
Infective stage: cercariae
Dx stage: eggs in feces
S. Japonicum
Circumoval precipitin test
Ovoid egg with small hook
S. Japonicum
Swimmer’s itch
Katayama fever
S. Japonicum
Endemic areas of s. Japonicum
Except misamis oriental all of mindanao Sorsogon Samar leyte Oriental mindoro Bohol
Ttt of trematodes
Praziquantel
Resembles TB
Ring shadow opacity on cxr
Paragonimiasis
Infective stage: metacercariae
Dx stage: unembryonated egg
Dx: 3% naOh prep
Paragonimus westermani
Intermediate host
Snail
Mountain crab
Paragonimus westermani
Trematode that can cause chronic biliary dse
Clonorchis sinensis
Dx: potassium permanganate stain
Melon like ridges
Clonorchis sinensis
Transmission: raw fish
Infective st: metacercariae
Dx stage; embryonated egg
Clonorchis sinensis
Cholangiocarcinoma due to clonorchis
Klatskin’s tumor
Obstructive jaundice and painful pharyngitis
Halzoun
Fasciola hepatica
Sheep liver fluke
Transmitted by eating watercress
Fasciola hepatica
Intestinal fluke
Mimics peptic ulcer dse
Heterophyes heterophyes